Filip Defoort wrote:
Hi,
I updated MerlinServlet and have a basic version of it running. One remaining
question though:
MerlinServlet used to set a getServletContext().setAttribute( "xxxx", m_kernel.getUrl() );
other classes like TestServlet and TargetTag were then using that value and
simply displaying it...
ahhh, yes - memories ...
I guess I need to replace this by some system that passes the Kernel / Root Block(?) / Engine (?)
to the TestServlet and TargetTag so that these classes can lookup components and
use the result of operations on components in their output?
Yep.
The objective was to provide a means whereby a servie could be requested by name together with a bunch of parameters. This would allow actional urls and other such stuff. I never got to try it out in a production environment but it seemed to be heading in a good direction.
As simple as setAttribute("merlin-root-block", m_kernel.getRootBlock() ) and then
block.resolveAppliance("componentname") ? Still a bit confused on what is what
in Merlin ;-)
Hey - I impressed with the progress your making!
Couple of things I came across during the update:
- in DefaultEmbeddedKernel, getSystemRepositoryDirectory() relies only on System.getProperties(),
there's no way to pass in an argument of some sort (via the Map()); this forced me to do an
ugly
system.setProperty( "maven.repo.local", getInitParameter("maven.repo.local"))
When we need additional parameters in the map - feel free to add as needed.
Remember that DefaultEmbeddedKernel is currently too strongly linked to the Maven context and that a getSystemRepositoryDirectory() should be returning something like ${merlin.home}/system - but I'm still playing with content to support that. In the meantime its using the Maven repo - but that should be considered as a temporary condition. Also, as this comes together there will be a case for rationalization across DefaultKernelContext, DefaultKernel, DefaultLoader, DefaultEmbeddedKernel.
- in DefaultKernelContext: give a NullPointerException if merlin.base.dir is not given.
Bit surpised about this, was expecting to default to the current working directory...
Can you point to the actual code fragment?
Steve.
So far, so good :-)
- Filip
Stephen McConnell wrote:
MerlinServlet was a first cut an embedding using version 2.1. Its way out of date and should be dropped - but I've left it around
in sandbox because it was example that handled some of the
web.xml things.
Steve.
Filip Defoort wrote:
Hi,
I was playing around with the MerlinServlet to get an idea of how Merlin can
be embedded, but it won't compile for the moment: initially complaining
about a missing ../../project.xml, which I then linked to ../../../../avalon/merlin/project.xml;
then complaining about Kernel.BASE_URL_KEY and DefaultLocator and the likes...
I'm guessing that the MerlinServlet would need to be updated to use the DefaultEmbeddedKernel iso doing the stuff directly as it's doing now ??
Thanks, - filip
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